Hi Svein,
Thanks for your reply. I regret that the 9lit/hr indicated figure I gave in
my last email is actually wrong - 9lit/hr is indicated with the 912ULS
running at idle and with boost pump 'on'. I just checked the boost
pump-only flow rate (my a/c is in the garage next door for the winter), and
it reads just over 4Lit/hr with a K factor of 17030 - which I think all
tallies rather well with your comments about 'spot' flow rates vs totalised
flow rates and the 9 lit/hr figures you have found. My K factor will be
specific to the sensor/Stratomaster setup of course, other combinations may
easily have different K factors.
Regards,
Clive.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Sidsel & Svein
Johnsen
Sent: 15 March 2013 18:19
Subject: SV: Europa-List: SV: Re: SV: fuel flow and return line status
--> <sidsel.svein@oslo.online.no>
Hello Clive,
> Thinking more about the single fuel flow setup - would you agree that
> another way of checking the restrictor is not blocked, is simply to
monitor
> that there IS fuel flow without the engine running but with the boost
> pump running? I get around 9L/hr.
>
> Assuming the float chambers are full and there are no external leaks,
> not sure where else fuel can go if it is not being consumed by a
> running
engine. . .
>
> Clive
>
Yes, I do agree. This is effectively the same as I will do with my
two-sender set-up : momentarily switch off the feed (total) flow sender and
switch the return flow sender to the feed input as a single sender.
Your 9L/hr return flow is close to what I measured when I, too, had a system
with only one sender - I got approx. 10L/hr. However, if you have adjusted
the k-factor to get a reasonably good totalizer function (i.e. adjusted the
k-factor so that the displayed fuel consumed on an average flight is
approximately correct), your actual return flow is higher than the displayed
flow, of course.
Regards,
Svein
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